2 * OpenGL function forwarding to the display driver
4 * Copyright (c) 1999 Lionel Ulmer
5 * Copyright (c) 2005 Raphael Junqueira
6 * Copyright (c) 2006 Roderick Colenbrander
8 * This library is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
13 * This library is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with this library; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
24 #include "wine/port.h"
36 #include "gdi_private.h"
37 #include "wine/debug.h"
39 WINE_DEFAULT_DEBUG_CHANNEL(wgl);
41 static HDC default_hdc = 0;
43 typedef struct opengl_context
48 /* We route all wgl functions from opengl32.dll through gdi32.dll to
49 * the display driver. Various wgl calls have a hDC as one of their parameters.
50 * Using get_dc_ptr we get access to the functions exported by the driver.
51 * Some functions don't receive a hDC. This function creates a global hdc and
52 * if there's already a global hdc, it returns it.
54 static DC* OPENGL_GetDefaultDC(void)
57 default_hdc = CreateDCA("DISPLAY", NULL, NULL, NULL);
59 return get_dc_ptr(default_hdc);
62 /***********************************************************************
63 * wglCreateContext (OPENGL32.@)
65 HGLRC WINAPI wglCreateContext(HDC hdc)
68 DC * dc = get_dc_ptr( hdc );
75 if (!dc->funcs->pwglCreateContext) FIXME(" :stub\n");
76 else ret = dc->funcs->pwglCreateContext(dc->physDev);
83 /***********************************************************************
84 * wglDeleteContext (OPENGL32.@)
86 BOOL WINAPI wglDeleteContext(HGLRC hglrc)
90 OPENGL_Context ctx = (OPENGL_Context)hglrc;
92 TRACE("hglrc: (%p)\n", hglrc);
96 /* Retrieve the HDC associated with the context to access the display driver */
97 dc = get_dc_ptr(ctx->hdc);
98 if (!dc) return FALSE;
100 if (!dc->funcs->pwglDeleteContext) FIXME(" :stub\n");
101 else ret = dc->funcs->pwglDeleteContext(hglrc);
103 release_dc_ptr( dc );
107 /***********************************************************************
108 * wglGetCurrentContext (OPENGL32.@)
110 HGLRC WINAPI wglGetCurrentContext(void)
112 HGLRC ret = NtCurrentTeb()->glContext;
113 TRACE(" returning %p\n", ret);
117 /***********************************************************************
118 * wglGetCurrentDC (OPENGL32.@)
120 HDC WINAPI wglGetCurrentDC(void)
122 OPENGL_Context ctx = (OPENGL_Context)wglGetCurrentContext();
124 TRACE(" found context: %p\n", ctx);
128 /* Retrieve the current DC from the active context */
129 TRACE(" returning hdc: %p\n", ctx->hdc);
133 /***********************************************************************
136 static HDC WINAPI wglGetPbufferDCARB(void *pbuffer)
140 /* Create a device context to associate with the pbuffer */
141 HDC hdc = CreateDCA("DISPLAY", NULL, NULL, NULL);
142 DC *dc = get_dc_ptr(hdc);
144 TRACE("(%p)\n", pbuffer);
146 if (!dc) return FALSE;
148 /* The display driver has to do the rest of the work because
149 * we need access to lowlevel datatypes which we can't access here
151 if (!dc->funcs->pwglGetPbufferDCARB) FIXME(" :stub\n");
152 else ret = dc->funcs->pwglGetPbufferDCARB(dc->physDev, pbuffer);
154 TRACE("(%p), hdc=%p\n", pbuffer, ret);
156 release_dc_ptr( dc );
160 /***********************************************************************
161 * wglMakeCurrent (OPENGL32.@)
163 BOOL WINAPI wglMakeCurrent(HDC hdc, HGLRC hglrc)
168 /* When the context hglrc is NULL, the HDC is ignored and can be NULL.
169 * In that case use the global hDC to get access to the driver. */
171 dc = OPENGL_GetDefaultDC();
173 dc = get_dc_ptr( hdc );
175 TRACE("hdc: (%p), hglrc: (%p)\n", hdc, hglrc);
177 if (!dc) return FALSE;
180 if (!dc->funcs->pwglMakeCurrent) FIXME(" :stub\n");
181 else ret = dc->funcs->pwglMakeCurrent(dc->physDev,hglrc);
183 release_dc_ptr( dc );
187 /***********************************************************************
188 * wglMakeContextCurrentARB
190 static BOOL WINAPI wglMakeContextCurrentARB(HDC hDrawDC, HDC hReadDC, HGLRC hglrc)
196 TRACE("hDrawDC: (%p), hReadDC: (%p) hglrc: (%p)\n", hDrawDC, hReadDC, hglrc);
198 /* Both hDrawDC and hReadDC need to be valid */
199 DrawDC = get_dc_ptr( hDrawDC );
200 if (!DrawDC) return FALSE;
202 ReadDC = get_dc_ptr( hReadDC );
204 release_dc_ptr( DrawDC );
210 if (!DrawDC->funcs->pwglMakeContextCurrentARB) FIXME(" :stub\n");
211 else ret = DrawDC->funcs->pwglMakeContextCurrentARB(DrawDC->physDev, ReadDC->physDev, hglrc);
213 release_dc_ptr( DrawDC );
214 release_dc_ptr( ReadDC );
218 /***********************************************************************
219 * wglShareLists (OPENGL32.@)
221 BOOL WINAPI wglShareLists(HGLRC hglrc1, HGLRC hglrc2)
225 OPENGL_Context ctx = (OPENGL_Context)hglrc1;
227 TRACE("hglrc1: (%p); hglrc: (%p)\n", hglrc1, hglrc2);
231 /* Retrieve the HDC associated with the context to access the display driver */
232 dc = get_dc_ptr(ctx->hdc);
233 if (!dc) return FALSE;
235 if (!dc->funcs->pwglShareLists) FIXME(" :stub\n");
236 else ret = dc->funcs->pwglShareLists(hglrc1, hglrc2);
238 release_dc_ptr( dc );
242 /***********************************************************************
243 * wglUseFontBitmapsA (OPENGL32.@)
245 BOOL WINAPI wglUseFontBitmapsA(HDC hdc, DWORD first, DWORD count, DWORD listBase)
248 DC * dc = get_dc_ptr( hdc );
250 TRACE("(%p, %d, %d, %d)\n", hdc, first, count, listBase);
252 if (!dc) return FALSE;
254 if (!dc->funcs->pwglUseFontBitmapsA) FIXME(" :stub\n");
255 else ret = dc->funcs->pwglUseFontBitmapsA(dc->physDev, first, count, listBase);
257 release_dc_ptr( dc );
261 /***********************************************************************
262 * wglUseFontBitmapsW (OPENGL32.@)
264 BOOL WINAPI wglUseFontBitmapsW(HDC hdc, DWORD first, DWORD count, DWORD listBase)
267 DC * dc = get_dc_ptr( hdc );
269 TRACE("(%p, %d, %d, %d)\n", hdc, first, count, listBase);
271 if (!dc) return FALSE;
273 if (!dc->funcs->pwglUseFontBitmapsW) FIXME(" :stub\n");
274 else ret = dc->funcs->pwglUseFontBitmapsW(dc->physDev, first, count, listBase);
276 release_dc_ptr( dc );
280 /***********************************************************************
281 * Internal wglGetProcAddress for retrieving WGL extensions
283 PROC WINAPI wglGetProcAddress(LPCSTR func)
291 TRACE("func: '%s'\n", func);
293 /* Retrieve the global hDC to get access to the driver. */
294 dc = OPENGL_GetDefaultDC();
295 if (!dc) return FALSE;
297 if (!dc->funcs->pwglGetProcAddress) FIXME(" :stub\n");
298 else ret = dc->funcs->pwglGetProcAddress(func);
300 release_dc_ptr( dc );
302 /* At the moment we implement one WGL extension which requires a HDC. When we
303 * are looking up this call and when the Extension is available (that is the case
304 * when a non-NULL value is returned by wglGetProcAddress), we return the address
305 * of a wrapper function which will handle the HDC->PhysDev conversion.
307 if(ret && strcmp(func, "wglMakeContextCurrentARB") == 0)
308 return (PROC)wglMakeContextCurrentARB;
309 else if(ret && strcmp(func, "wglGetPbufferDCARB") == 0)
310 return (PROC)wglGetPbufferDCARB;